...In other words, the two umbilical arteries originating from the fetus carry the fetal venous blood to the placenta, transfer carbon dioxide and waste products to the mother's blood through the chorionic membrane in the placenta, and take in oxygen and nutrients necessary for growth from the mother's blood, returning it to the fetus through one umbilical vein. This is the feto-placental circulation, and because the placenta functions like the kidneys and liver, the fetus can develop even if its own organs are immature. The amniotic fluid, fetal membrane, placenta, and umbilical cord are called fetal appendages, meaning that they are attached to the fetus (Figure). ... *Some of the terminology that refers to "feto-placental circulation" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…すなわち,胎児から発した2本の臍動脈は胎児の静脈血を胎盤に運び,胎盤の中の絨毛(じゆうもう)膜を通して炭酸ガスや老廃物を母体の血液へ移し,酸素や発育に必要な栄養物を母体血から取り入れて,また胎児へ1本の臍静脈を通じて戻ってくる。これが胎児・胎盤循環feto‐placental circulationであり,胎児は胎盤が腎臓や肝臓のような働きをしているので,自分の臓器が未熟でも発育していける。羊水,卵膜,胎盤,臍帯は胎児に付属しているものという意味で胎児付属物fetal appendageという(図)。… ※「feto-placental circulation」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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